Locked wheel protection activates when a wheel slows to what percent or less of the companion wheel velocity?

Locked wheel protection activates when a wheel slows to what percent or less of the companion wheel velocity?

• A. 10%
• B. 20%
• C. 30%
• D. 40%

Answer: (C)

Locked wheel protection is part of the braking/anti-skid system that prevents a wheel from locking by watching the speeds of both main wheels. If one wheel slows to about one-third the speed of its companion wheel, the protection logic activates and eases or cuts brake pressure on that wheel. This early intervention stops a locked or skidding wheel from causing tire damage and helps keep the airplane controllable. The threshold is set to strike a balance: it’s fast enough to catch impending lock before the tire skids, but not so sensitive that normal braking would trigger protection and reduce braking effectiveness.

Locked wheel protection is part of the braking/anti-skid system that prevents a wheel from locking by watching the speeds of both main wheels. If one wheel slows to about one-third the speed of its companion wheel, the protection logic activates and eases or cuts brake pressure on that wheel. This early intervention stops a locked or skidding wheel from causing tire damage and helps keep the airplane controllable. The threshold is set to strike a balance: it’s fast enough to catch impending lock before the tire skids, but not so sensitive that normal braking would trigger protection and reduce braking effectiveness.